tests: skip machines testCreate in debian-stable in case qemu error is missing
tests: skip machines testCreate in debian-stable in case qemu error is missing

debian-stable has old version of QEMU (2.8.1) which contains a bug that is
probably fixed in newer versions. If the host is under a load QEMU binary
crashes in TCG code which will result in not printing any error and only the
libvirt warning.

Skip test if test image is debian-stable and the error message doesn't
contain qemu failure details.

Closes #10649

cockpit-project/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpituous/cockpit,andreasn/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,andreasn/cockpit,cockpit-project/cockpit,martinpitt/cockpit,cockpit-project/cockpit,andreasn/cockpit,mvollmer/cockpit,mvollmer/cockpit,deryni/cockpit,mvollmer/cockpit,deryni/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,garrett/cockpit,martinpitt/cockpit,cockpit-project/cockpit,andreasn/cockpit,mvollmer/cockpit,deryni/cockpit,garrett/cockpit,deryni/cockpit,andreasn/cockpit,cockpituous/cockpit,garrett/cockpit,andreasn/cockpit,deryni/cockpit,andreasn/cockpit,cockpituous/cockpit,mvollmer/cockpit,garrett/cockpit,martinpitt/cockpit,martinpitt/cockpit,garrett/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,deryni/cockpit,cockpituous/cockpit